Implemented retrieving Solr results
Cleaning up some TODOs, introduced new config value for requestHandler
Changes to data-config and schema

* Made several small changes to the data-config and schema.xml in order
to get the solr server running on the ec2 instance
* Tweaked the solrconfig.xml file to include the new category and
displayname fields
Changing schema back to all text_general. Few minor changes to service config classes and solrdao.
Implemented ProductSearchResource.